I am recycling this post to the top to see if anyone has found the answer. I have a friends' 98 S420 that has the ABS, and the "BAS-ASR" Lights come on 3 months ago. I dont know why, but I am searching high and low to find out. Please post here as I am suscribing to this post.

Prevost3000

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1989 MERCEDES-BENZ 190E 2.6L GAS/AUTO [LOADED]
1989 MERCEDES-BENZ 190E 2.6L GAS/AUTO [PARTS CAR]**Do you need a part? PM me**
1997 ISUZU TROOPER LIMITED 4X4 [LOADED][/FONT]